Octane v1.00 RC3 -VS- KEPLER BUILT v2.58e

[madcoo]

Hi all,

I just installed RC3 and tested the Benchmark scene.

Here's my setup :
- Windows 7 - 64bits
- 18Gb RAM (but only 16Gb useable by Windows)
- 2x GTX 680

I was using Octane 2.58e Kepler Built so far because I had to (Kepler GPUs...), so I decided to test out the difference between the two releases.
I don't know whether this post will be of any use to the Octane team, but I thought it'd be a good idea to share this.

Note : I had to change the material's Roughness value, probably because Octane's coding is different now...
(2.58e -> Roughness value = 0.01 // same file opened in 1.00 RC3 -> Roughness value = 0.2)

01a- OctaneRender_2.58e_KeplerBuilt_win64 - 2xGTX680.jpg

02a- OctaneRender_1_00_RC3_win64 - 2xGTX680.jpg

01b- OctaneRender_2.58e_KeplerBuilt_win64 - 2xGTX680.jpg

02b- OctaneRender_1_00_RC3_win64 - 2xGTX680.jpg

[EDIT : sorry I should have put this post in the "Release Candidate Testing Forum" - feel free to move it there]

[roeland]

Hi,

Version 2.58e was showing the wrong amount of CUDA cores for Kepler GPUs.

We have also changed the glossy reflection model. The old one used before beta 3.02 had a lot of energy loss for materials with a high rouhgness, making the glossy reflections in this scene less bright.

--
Roeland

[madcoo]

Thanks for your reply Roeland, useful stuff to know.
Cheers!

[erges]

HI, does this v1 RC3 works better with GTX 6-series ?
Now kepler has full performance with octane and runs faster thern 5-series ?
Tnx

[madcoo]

Hi Erges,
I think the GTX 5xx are still better handled by Octane than the 6xx, but I'm not sure...

[roeland]

Most Kepler cards (which are most 6xx GPU's) are slightly slower than comparable 5xx cards. The 690 has almost the same performance as the 590, while the 680 is still slightly slower than the 580. The 6xx cards use significantly less power than the 5xx cards, meaning less problems with power supply and heat.

--
Roeland

[madcoo]

Thanks for replying Roeland
Indeed I can confirm that the 6xx are definitely less noisy and heat up much less than the 5xx.
I haven't checked my power consumption yet, but I heard the 6xx used less power indeed.

[Akanaro]

It is a well known fact that Kepler cards were designed with gaming performance in mind and as a result Kepler cards do not have nearly the same mathematical processing power that Ferni processors had. Since there are quite a few calculations when it comes to things like lighting it is no surprise that Kepler cards takes a bit longer. That's my understanding of things anyway.